BONNIVET, GUILLAUME GOUFFIER, SEIGNEUR DE (c. French soldier, was brought up with Francis I. of France, and after the young king's accession he became one of the most powerful of the royal favourites. In 1518, as the head of the French embassy in England, he acted as proxy for the Dauphin in his marriage with Princess Mary. He was the im placable enemy of the constable de Bourbon and contributed to his downfall. In command of the army of Navarre in 1521, he occupied Fuenterrabia and was probably responsible for its non restoration and for the consequent renewal of hostilities. He suc ceeded Marshal Lautrec in 1523 in the command of the army of Italy and entered the Milanese, but was defeated and forced to effect a disastrous retreat, in which the chevalier Bayard perished. He was one of the principal commanders of the army which Francis led into Italy at the end of 1524 and died at the battle of Pavia on Feb. 24, 1525. According to Brantome, Bonnivet was the successful rival of the king for the favours of Madame de Chateaubriand and is said to have been the hero of the fourth story of the Heptameron.
BIBLIOGRAPHY.-Bonnivet's correspondence in the Bibliotheque Bibliography.-Bonnivet's correspondence in the Bibliotheque Nationale, Paris ; memoirs of the time ; complete works of Brantome, vol. iii., published by Ludovic Lalanne for the Societe de l'Histoire de France (1864 seq.) . See also Ernest Lavisse, Histoire de France, vol. v., by H. Lemonnier (1903-04) .